Improvement in plow-clevises



UNITED STATES .PArrNr JOHN s HALL, or MANcriEIsTEn,rENNsYLvANIA.

Spccication forming-part of Letters-Patent No. 30,813, dated December 4, 186C.

To all whom it may concern:

Be it known that I, JOHN S. HALL, of 'Man- `ehester, in the' county of Alleghenyandtate of Pennsylvania, have invented anew and useful Improvement in the Manner of Constructing Plow-Clevises and I do hereby declare the follow'ing to be a full, clear, and exact descripon of the construction of the same, reference bein g had to the accompanying drawings, makallv of the drawings.

Glevises for plows, A&c., are more generally made'by upsetting, Weldin g, or working down aber of iron; but they have been made of strap ,or atiron, with aseparate bar to hold the1ink. 1n either of these cases there must be considerable heating and Workingof the metal, andconseqentexpensein the 4production of the clevis.

l Such construction I lay no .claim to. .My object vis to makeva plow-clevis out of lia-t or strap iron entirely, without welding, upsetting, or Working down the bar, and with a .single heat 'barely suiiicient toallow the metal to bend, and not near that .of a welding-heat, by which means I not only expedite, but veryniuch cheapen the cost 'of the clevis. A

My invention consists in'clam ping a strengthching-plate in the bend of the cle'vis by 'bending down or over thestrap or flat bar of which'v the clevis is made, as will be explained,.said plate serving, if so desired, as the means of adjusting the link lon the clevisfor deep or shallow plowing, which is necessary with suclr articles; ,d v l I 'Toenable othors skilled in the art to make and use my im enti'oxnl will proceed tofde scribe the same with reference to the drawings.

I cient size to form the-fiat sides A ofthe clevis that is fastened to the' beam B. A't'the center long, more or less, the edges are bent together, as seen at C, or nearly so. I then take a plate, D, previously stamped out of strapiroh, and insert it into or between the bentdown portions of the dat bar ,and` then firmly bring down the portions C onto 'the plate, and at thesame instant bend around the bar into the clevis form or shape shown in the drawings. This bending is best and more'uniforml y done by dies or clamps, though it may be done'- over the anvil. The plate D is formed, for the sake of economy, with a series of recesses a c,

A85e., to'receivethelink E and admit'ot' 'its adjustment. A separate plate, however, or bar may beused for this purpose, while the plate D is only a strengtheningplate, and resists the strain and wear of the linkor clevis-ring E. VWhen the plate Dis inserted in the bent portonsof the strap the 'two ef'nds'are brought V around, as shown in Figs. l and-2, the ends of the plate D defining the shapeA of the curve or bend, and these ends may be curved, inclined, or irregular, and when the sides are brought againstit it is permanently held there withou't Welding, riveting, or any other fastening than that of ,being 'clamped in" the clevis-bar botli endwise and laterally.l

In Fig. 3 I have shownlthe bent portions of strap in' a'circularform, which gives more impact or bearing-surfa/ceito the clevis-rin g E, (in

red,) which prevents the parts from wearing. In Fig. 4 the bent portions vare more flat, causing more friction-surface uponn theplate D and less contact-surface between the ring and the clevis. Both answera good purpose, and either may be used.. The strain upon the ring Ev is brought partially againstthe plate D andipartially against the clevis-iron, .which makes the clevis abundantly strong, though madeot very light strap-iron. When thestrap is bentdown over and against theplate fD, or set down against it by a propertool or clamp, thefplate s is asimmovablyixed as though it were welded there, While I avoid in reality the necessity of a welding-heat. F is a 'bolt for securing the clevis to the beam, and G a pin to prevent it from ternngon said bolt. i When it becomes 'necessary t change the clevis-rin g E from one recess a toanother the pin-G 'iswithdravvn and the cle'is swung around clear ofthe beam,

"and thentla ring can .be'readily shifted. 'It

would be poeible to .inake afcle''is`Y and' around'th'epiece of ineta so s :to inclose' .The portions .C may also ybespx'ead out before ting -the notchesn the bent portions C and arid'i'igidly hold a strengthening-plate in its leaveoub the plate; butit would scarcely have, bends or folds, substantially/ias herein de the necessary strength to resist;` the strain. scribed. *l j f bending. u .A Y v N i JOHN AS. HALL...

liaving thus fully described thenature and Witnesses;

' object of my. inventiou,what I claim S' l j A. B. STOGHT'N,

r The making o f a @levis by bending down COHEN. 

